The Electrolux Trilobite is a robotic vacuum cleaner manufactured by the Swedish corporation Electrolux. It takes its name from the extinct arthropod, which scoured the ocean's floor. The prototype cleaner was first seen on the BBC television programme, Tomorrow's World, in 1997, when it was demonstrated by presenter Philippa Forrester. It was the world's first commercially available autonomous vacuum cleaner, introduced as a product in 2001.

The Trilobite contains a vacuum cleaner and a removable roller brush capable of working on deep-pile carpet. It has the ability to map rooms and avoid obstacles by using ultrasonic sensors (on the Mark 2 model also infrared). It recharges itself on a charging base, which it automatically finds when has completed its cleaning task or its power runs low. The Trilobite will indicate when the dustbin needs to be emptied.

Its ultrasonic sensors allow it to come within 1" of objects without colliding with them. This object detection is fairly reliable, but sometimes fails if the robot approaches an object with a sharp corner. In this case, the ultrasonic beam is not reflected, and the Trilobite will gently bump into the object. Because the Trilobite stops a short distance from walls and other objects, it leaves small areas that are not fully cleaned.

Magnetic strips are used to block off areas that the Trilobite should not enter, and infrared sensors (on the Mark 2 model) protect it from falling down stairs or off ledges.

Electrolux has discontinued the Trilobite, removing any product information from its website, referencing instead its Wikipedia page for information.